﻿namespace RegexMaster
{
    using System;
    using System.Diagnostics;
    using System.IO;
    using System.Reflection;
    using System.Windows.Forms;
    using Microsoft.Win32;

    internal partial class AboutBox : Form
    {
        public AboutBox()
        {
            InitializeComponent();
            Text = String.Format("About {0} {0}",
                                 AssemblyTitle);
            labelProductName.Text = AssemblyProduct;
            labelVersion.Text = String.Format("Version {0}",
                                              AssemblyVersion);
            labelCopyright.Text = AssemblyCopyright;
            labelCompanyName.Text = AssemblyCompany;
            textBoxDescription.Text = AssemblyDescription;
        }

        #region Assembly Attribute Accessors

        public string AssemblyTitle
        {
            get
            {
                object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(
                    typeof(AssemblyTitleAttribute),
                    false);
                if (attributes.Length > 0)
                {
                    AssemblyTitleAttribute titleAttribute = (AssemblyTitleAttribute)attributes[0];
                    if (titleAttribute.Title != "")
                    {
                        return titleAttribute.Title;
                    }
                }
                return Path.GetFileNameWithoutExtension(Assembly.GetExecutingAssembly().CodeBase);
            }
        }

        public string AssemblyVersion
        {
            get
            {
                return Assembly.GetExecutingAssembly().GetName().Version.ToString();
            }
        }

        public string AssemblyDescription
        {
            get
            {
                object[] attributes =
                    Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyDescriptionAttribute),
                                                                        false);
                if (attributes.Length == 0)
                {
                    return "";
                }
                return ((AssemblyDescriptionAttribute)attributes[0]).Description;
            }
        }

        public string AssemblyProduct
        {
            get
            {
                object[] attributes =
                    Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyProductAttribute),
                                                                        false);
                if (attributes.Length == 0)
                {
                    return "";
                }
                return ((AssemblyProductAttribute)attributes[0]).Product;
            }
        }

        public string AssemblyCopyright
        {
            get
            {
                object[] attributes =
                    Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute),
                                                                        false);
                if (attributes.Length == 0)
                {
                    return "";
                }
                return ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
            }
        }

        public string AssemblyCompany
        {
            get
            {
                object[] attributes =
                    Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCompanyAttribute),
                                                                        false);
                if (attributes.Length == 0)
                {
                    return "";
                }
                return ((AssemblyCompanyAttribute)attributes[0]).Company;
            }
        }

        #endregion

        private void labelCompanyName_LinkClicked(object sender,
                                                  LinkLabelLinkClickedEventArgs e)
        {
            string defaultBrowserPath = GetDefaultBrowserPath();
            try
            {
                Process.Start(defaultBrowserPath,
                              labelCompanyName.Text);
            }
            catch
            {
            }

            // Process p = new Process();
            // p.StartInfo.FileName = GetDefaultBrowserPath();
            // p.StartInfo.Arguments = "http://www.yahoo.com";
            // p.Start();
        }

        /// <summary>
        /// Reads path of default browser from registry
        /// </summary>
        /// <returns></returns>
        private static string GetDefaultBrowserPath()
        {
            string key = @"htmlfile\shell\open\command";

            RegistryKey registryKey =
                Registry.ClassesRoot.OpenSubKey(key,
                                                false);

            // get default browser path
            return ((string)registryKey.GetValue(null,
                                                 null)).Split('"')[1];
        }
    }
}